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this time targetting ABI level 3; partially based on how claudio@
handled it in rpki-client. Fun how this bit of code has come full
circle (gmid inspired what I wrote for got, which inspired what was
written for rpki-client, which has come back.)
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gmid (like all other daemons that want to do privsep crypto) has a
very close relationship with libtls and need to stay in sync with
it.
OpenBSD' libtls was recently changed to use OpenSSL' EC_KEY_METHOD
instead of the older ECDSA_METHOD, on the gmid side we have to do
the same otherwise failures happens at runtime. In a similar manner,
privsep crypto is silently broken in the current libretls (next
version should fix it.)
The proper solution would be to complete the signer APIs so that
applications don't need to dive into the library' internals, but
that's a mid-term goal, for the immediate bundling the 'little'
libtls is the lesser evil.
The configure script has gained a new (undocumented for the time
being) flag `--with-libtls=bundled|system' to control which libtls
to use. It defaults to `bundled' except for OpenBSD where it uses
the `system' one. Note that OpenBSD versions before 7.3 (inclusive)
ought to use --with-libtls=bundled too since they still do ECDSA_METHOD.
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strnvis originates on OpenBSD. When NetBSD added it to their libc
they decided to swap the argument. Without starting a holy war on
the "best" argument order, adding an implementation of a function
that's widely available and making its signature purposefully
incompatible is beyond justification. FreeBSD (and so macos too?)
followed NetBSD in this, so we end up with *two* major and incompatible
strnvis implementations. libbsd is in a limbo, they started with
the OpenBSD version but they'll probably switch to the NetBSD version
in the future.
That's why we can't have nice things.
Do the right thing(tm) and check for the presence of the original
strnvis(3), if not available or broken use the bundled one.
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now it resembles less oconfigure and more the configure scripts I'm
using in my recent projects. I'd argue it's more easy to use it.
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it reached a point where this stuff is not maintenable. I'd like
to move forward with gmid, but the restriction of capsicum and the
linux environment at large that make landlock unusable (how can you
resolve DNS portably when under landlock?) -and don't get me started
on seccomp- makes it impossible for me to do any work.
So, I prefer removing the crap, resuming working on gmid by cleaning
stuff and consolidating the features, improving various things
etc... and then eventually see how to introduce some sandboxing
again on other systems. Patches to resume sandboxing are, as always,
welcome!
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matches found with
% grep -R '=[ ]*{' . | fgrep -v const
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* add configure check
* change the way the headers are required (copied from tmux)
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First move towards landlock support (#3). The shim is needed until
libc provides the proper wrappers for the landlock APIs; I hope it
doesn't take too long, but landlock was merged back in May and are
still missing.
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This adds a check for setproctitle and for the (linux) prctl
PR_SET_NAME. If setproctitle is not available, on linux we provide an
implementation that use prctl (taken from tmux compat layer.)
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tested on openbsd, alpine and void
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